<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片式图区域 -->
    <el-card>
      <!--2. 为 ECharts 准备一个定义了宽高的 DOM -->
      <div id="main" style="width: 750px;height:450px;"></div>
    </el-card> 
  </div>
</template>

<script>
  // 1.导入echart
  import * as echarts from 'echarts'
  import _ from 'lodash'

  export default {
    data() {
      return{
        // 需要合并的数据
        options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
      }
    },
    async mounted() {
      // 3. 基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'));

      const {data: res} = await this.$http.get(`reports/type/1`)
      if(res.meta.status !== 200) {
        return this.$message.error('获取折线图数据失败！')
      }

      // 4.准备数据和配置项
      const result =_.merge(res.data, this.options)

      // 5.展示数据
      myChart.setOption(result);
    },
    methods: {
      
    }
  }
</script>

<style scoped>

</style>